Find the odd number / letters / word from the given alternative.

Run
Walk
Think
Jump E. Swim

The odd one out is C. Think.

The other options are all physical activities that can be done by humans. Thinking is not a physical activity, but a mental activity.

Run: to move at a speed faster than a walk, never having both or all the feet on the ground at the same time.

Walk: to move at a slower pace than a run, with both or all the feet on the ground at the same time.

Jump: to push oneself off the ground with one’s feet and move through the air for a short time.

Swim: to move through water using the arms and legs.